WATER-BREATHING SNAILS. 



217 



Fig. 386. — Cerithium. Fig. 387. — Melania. Fig. 388. — lo. 

 Much reduced. Moluccas. Western States. Southern States. 



Fig. 389. — Tower 



Shell, or Turriiella. 



West Indies. 



Fig. 390. — Wemlcirap. 

 Reduced. China. 



Fig. 391. — Worm- 

 shell, or Vermelus. 

 West Indies. 



Fig 392. — Fig. 393.- 

 Periwinlile, Lacuna, 

 or Litorina. 



Fig. 394- - 

 Valvata. 



F'fJ- 395- — River Snail Shell, 



U. States, or Paludina. United States. 



